Bently Nevada 990-04-XX-03-00 990 Series Vibration Transmitter

Product Overview

The Bently Nevada 990-04-XX-03-00 integrates a Proximitor sensor and signal conditioner into a single, compact unit. This two-wire, loop-powered transmitter interfaces directly with 3300 NSv proximity probes and extension cables. It converts radial vibration into a proportional 4-20 mA DC output, enabling direct machinery monitoring via a PLC or DCS without the need for a separate monitoring rack. We supply this unit as 100% brand new and original equipment.

Part Number Breakdown

The 990-04 series follows a specific configuration logic to match industrial requirements:

Technical Specifications

The following parameters define the operational envelope of the 990-04-XX-03-00:

• Input Compatibility: Bently Nevada 3300 NSv Proximity Probe & Extension Cable.

• Output Signal: 4-20 mA DC (Proportional to peak-to-peak vibration).

• Power Supply: Loop-powered (12 to 35 Vdc).

• Operating Temperature: -35°C to +85°C (-31°F to +185°F).

• Weight: 0.43 kg (0.95 lb).

• Maximum Cable Length: Supports up to 300 meters (1,000 feet) of field wiring.

Engineering Advantages

• Elimination of External Drivers: The integrated design combines the Proximitor and transmitter. This reduces component count, simplifies the bill of materials, and lowers potential failure points in the signal chain.

• Optimized for Tight Spaces: The small form factor allows for installation in high-density junction boxes or directly on the machine skid where space remains at a premium.

• Noise Immunity: The transmitter conditions the high-frequency eddy current signal into a robust 4-20 mA loop locally. This protects the data integrity from electromagnetic interference (EMI) during long-distance transmission to the control room.

• Simplified Commissioning: The unit features a non-interacting zero and span adjustment. Maintenance teams calibrate the loop quickly without the iterative "seesaw" adjustments required by older analog models.

FAQs

• Can I use the 990-04-XX-03-00 with a standard 3300 XL 8mm probe?

  No. This specific model (03 mounting) specifically targets the 3300 NSv (Narrow Side View) probe system. The NSv system addresses applications with small target areas or confined spaces where standard probes cannot function due to side-viewing interference.

• How do I verify the probe gap during installation?

  The transmitter includes a "Gap" terminal. You can connect a standard digital multimeter (DVM) to measure the voltage, ensuring the probe sits within the linear range before locking the mounting hardware.

• Does the unit require a specific orientation when mounting on a DIN rail?

  The 990-04-XX-03-00 utilizes a rugged 35mm DIN rail clip. While it functions in any orientation, we recommend vertical mounting in high-vibration environments to ensure maximum clip retention and heat dissipation.

• Is this a refurbished or surplus unit?

  No. We guarantee this product is 100% brand new, original Bently Nevada stock, shipped in factory packaging with full manufacturer traceability.